Are you flying J or Y? I personally think that the J seats on the 737 are more comfortable than the A320. However, it's only a 2 hr flight so it shouldn't be too bad.
Entertainment system on the 737 is a hit or miss... I've been on YYZ-YEG on a 737 where there was no entertainment system but the good thing about the 737 is that all J seats have in seat power. {The good old days...

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